Flat panel display and method for making the same
View Patent ↗A flat panel display includes a thin film transistor formed on a substrate; a planarization layer formed on the thin film transistor; a first electrode layer formed on the planarization layer and electrically connected with the thin film transistor through the via hole formed in the planarization layer; a pixel definition layer formed on the planarization layer and in which an opening for at least partially exposing the first electrode layer is formed; an adhesive reinforcement layer formed at least between the planarization layer and the pixel definition layer on the top of the planarization layer; an emitting layer formed on the first electrode layer; and a second electrode layer formed on the emitting layer and the pixel definition layer. The flat panel display has an improved adhesive property between a pixel definition layer and a planarization layer, which prevents a chipping phenomenon of the pixel definition layer.
1. A method for making a flat panel display, the method comprising:
providing a substrate;
forming a planarization layer over the substrate;
forming a first electrode over a portion of the planarization layer;
forming an adhesive reinforcement layer in contact with the planarization layer and over an entire surface of the first electrode;
forming a pixel definition layer over the adhesive reinforcement layer, the pixel definition layer including an opening in a location corresponding to a portion of the first electrode;
forming an organic light-emitting layer on the adhesive reinforcement layer wherein the organic light-emitting layer does not contact the first electrode; and
forming a second electrode over the organic light-emitting layer and at least a portion of the pixel definition layer.
2. The method of claim 1 , further comprising:
forming a thin film transistor after providing the substrate and before forming the planarization layer; and
forming a via hole in the planarization layer after forming the planarization layer and before forming the first electrode,
wherein forming the first electrode comprises forming another portion electrically connecting the first electrode to the thin film transistor through the via hole, and
wherein forming the adhesive reinforcement layer further comprises forming the adhesive reinforcement layer on the other portion of the first electrode.
3. The method of claim 1 , wherein the adhesive reinforcement layer is formed of at least one material selected from the group consisting of siloxane, cyclohexane, toluene, para-xylene, and decahydronaphthalene.
4. The method of claim 3 , wherein the siloxane comprises decamethyl cyclopentasiloxane.
5. The method of claim 1 , wherein the adhesive reinforcement layer has a thickness of about 10 Å to about 50 Å.
6. The method of claim 1 , wherein forming the adhesive reinforcement layer comprises using plasma.
7. The method of claim 1 , further comprising treating the adhesive reinforcement layer with at least one material selected from the group consisting of sulfur, phosphorous, and hydrogen-helium (H 2 —He).
8. The method of claim 1 , wherein forming the organic light-emitting layer comprises using a laser-induced thermal imaging process.